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http://hdl.handle.net/20.500.11889/2147
Title: | Studies of the reactions of iron(II) ascorbate mixtures with molecular oxygen in solution | Authors: | Hamed, Mazen Keypour, Hassan Silver, Jack Wilson, Michael |
Issue Date: | Aug-1988 | Publisher: | ResearchGate | Source: | Hamed, Mazen. "Studies of the reactions of iron(II) ascorbate mixtures with molecular oxygen in solution." Inorganica Chimica Acta, vol. 152, pp. 227-231 | Abstract: | Mijssbauer and electronic absorbance spectrossopic studies on the reactions of iron(II):ascorbic acid with molecular oxygen in aqueous and methanolic solutions are reported. Both spectroscopic techniques show that in the starting mixtures there are no iron(II):ascorbate complexes. On mixing the iron- (II)/ascorbate solution with solutions containing molecular oxygen at pH 6-7 high spin iron(II1) is observed in the Mijssbauer spectrum. Coloured intermediates, the lifetimes of which are solvent dependent, are seen by stopped-flow spectrophotometry. We assign these coloured intermediates as iron(II1) ascorbate complexes. The stoichiometry of the initial reaction between iron(I1) and oxygen is shown to be 2Fe(II):02 by stopped-flow methods. A scheme for the overall reactions is discussed. | Description: | Article published in : Inorganica Chimica Acta, 152, 1988, pp. 227-231 | URI: | http://hdl.handle.net/20.500.11889/2147 |
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